| 青藏铁路冻土路基沉降变形现场试验研究 |
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| 引用本文： | 张建明,张明义,朱元林,蒋观利.青藏铁路冻土路基沉降变形现场试验研究[J].冰川冻土,2004,26(Z1):155-160. |
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| 作者姓名： | 张建明 张明义 朱元林 蒋观利 |
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| 作者单位： | State Key Laboratory of Frozen Soil Engineering, CAREERI, CAS, Lanzhou Gansu 730000, China |
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| 摘 要： | Based on the field data of ground temperature and roadway settlement observed during the construction of the experimental embankments over permafrost along the Qinghai-Tibetan Railway, this paper discusses the differences of frost process on the roadway surface from that on the natural ground surface, the changes of permafrost table under the roadway embankment, and the peculiarities of roadway settlement. Analyses of the test results show : 1) The differences of the freezing indexes between the roadway surfaces and the natural ground surfaces are less than those of the thawing indexes for all the test sections; 2) Since the measures of permafrost protection were taken, the permafrost tables under the embankments have raised after the roadway was constructed. The minimum is about 0.4 m and the maximum is 1.2 m; 3) the settlements of the roadway are mainly from the compression and creep of the icerich frozen soils under the original permafrost tables and the maximum has reached 6 ～ 8 cm during the first year after the embankments were constructed. Moreover, concerning the processes of roadway settlement, the deformation of the embankments has no obvious trend of attenuation at present. Especially,for the roadway with high embankments, the settlement may reach a remarkable value and much consideration must be given for this problem.
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| 关 键 词： | Qinghai-Tibetan Railway roadway over permafrost experimental engineering permafrost table embankment settlement 青藏铁路 冻土 路基沉降变形 现场试验研究 Railway Permafrost Embankment Settlement Study reach value consideration problem high Especially deformation trend attenuation present concerning |
Experimental Study on Settlement of Embankment over Permafrost along Qinghai-Tibetan Railway |
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| ZHANG Jian-ming,ZHANG Ming-yi,ZHU Yuan-lin,JIANG Guan-li.Experimental Study on Settlement of Embankment over Permafrost along Qinghai-Tibetan Railway[J].Journal of Glaciology and Geocryology,2004,26(Z1):155-160. |
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| Authors: | ZHANG Jian-ming ZHANG Ming-yi ZHU Yuan-lin JIANG Guan-li |
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| Abstract: | Based on the field data of ground temperature and roadway settlement observed during the construction of the experimental embankments over permafrost along the Qinghai-Tibetan Railway, this paper discusses the differences of frost process on the roadway surface from that on the natural ground surface, the changes of permafrost table under the roadway embankment, and the peculiarities of roadway settlement. Analyses of the test results show : 1) The differences of the freezing indexes between the roadway surfaces and the natural ground surfaces are less than those of the thawing indexes for all the test sections; 2) Since the measures of permafrost protection were taken, the permafrost tables under the embankments have raised after the roadway was constructed. The minimum is about 0.4 m and the maximum is 1.2 m; 3) the settlements of the roadway are mainly from the compression and creep of the icerich frozen soils under the original permafrost tables and the maximum has reached 6 ～ 8 cm during the first year after the embankments were constructed. Moreover, concerning the processes of roadway settlement, the deformation of the embankments has no obvious trend of attenuation at present. Especially,for the roadway with high embankments, the settlement may reach a remarkable value and much consideration must be given for this problem. |
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| Keywords: | Qinghai-Tibetan Railway roadway over permafrost experimental engineering permafrost table embankment settlement |
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